mirror of
https://github.com/moby/moby.git
synced 2026-07-12 02:25:19 +00:00
56eb47c622
Commit facb2323 aligned the way the default bridge's IPv6 subnet
and gateway addresses are selected with IPv4.
Part of that involved looking at addresses already on the bridge,
along with daemon config options. But, for IPv6, the kernel will
assign a link-local address to the bridge.
Make sure that address is ignored when selecting "bip6" when it's
not explicitly specified.
This is made slightly complicated because we allow fixed-cidr-v6
to be a link-local subnet (either the standard "fe80::/64", or
any other non-overlapping LL subnet in "fe80::/10").
Following this change, if fixed-cidr-v6 is (or is included by)
"fe80::/64", the bridge's kernel-assigned LL address may be used
as the network's gateway address - even though it may also get an
IPAM-assigned LL address.
Signed-off-by: Rob Murray <rob.murray@docker.com>